Pan-conveyer link-belt construction



R. W. DULL.

. PAN CONVEYER LINK BELT CONSTRUCTION.

APPLICATION FILED MAR. 29, 1917.

Pa....t..1 Apr. 4, 1922. 3

a IN

TED IM -RAYMOND w. DULL, or enanenfrrLnxrorsi' To all whom it may concern:

Be it known that I, RAYMOND lV. DULL, a

citizen of the United State'sof America,and,

resident of La Grange, Cook County, Illinois, have. invented acertain new and useful Improvement in Pan V-Conveyer Link- Belt Constructions, of which the following isv a specification.

vMy invention relatesto link-belts in general, but more particularly to those which are used 'in connection. with pan-conveyers, such, for example,.as those in which overlapping pans are mounted on parallel. linkbelts to form a practically continuous trough for the materials, 1. The object'of my invention 1s to provide an improved constructionv and arrangement 7 which-Will prevent or tend to prevent-undue tail s' :a ndfeatures;ofconstruction and com- Wear in the of the belt.

Another object is to:provide an improved construction and arrangement i whereby the links of a-belt. of this kind can each be cast in one integral piece pivotebearings between the links A. further object is to provide an im proved construction and arrangement where by a link-belt of this kind is self-lubricating in character, being .provided with means for supplying a: lubricant to the pivot-bearings between the links.

Itis also an object to provide certain'debinations tending to, increase the general efficiency and serviceability of a link-belt for this particular purpose.

To these and other useful ends, my invention consists in matters hereinafter set forth and claimed.

' In the accompanying drawings Fig. 1 is a side elevation of a portion of a pan-conveyer having a link belt embodying the principles of my invention.

Fig. 2 is a plan of one side portion ofsaid pan-conveyer.

Fig. 8 is an enlarged cross-section on line 33 in Fig. 1. I

Fig. 4 is an enlarged cross-section on'line l-4 in Fig. 1.

Fig. 5 is an enlarged cross-section on line 55 in Fig. 1;

Fig. 6 is an-edge view, on a smaller scale, of one-of the pulleys or Wheels upon which the link-belt is supported.

As thus illustrated, my invention com prises alternate links A which are each cast 'sides' provided with VPAN-CON'VEYEIFL LINK-BELT constra'ucrrom Specification of Letters lfatcnti Pat nted Ap i Application filed March 29, 1917. Serial No.-'158 ,162.

to provide a chamber a, and the lower b'aition of each link being taperedgin cross-sec tiontoiprovide a wedge-shapedengaging:

portion 1, so, that these, links may engage the V-shaped channel 2 in the wheel B,- which V latter maybe-mounted in suitable manner. Theintermediate links G are also each cast'i'none integral piece,fbut are each com-1 D are insertedthroughthe ends oftheilinks',

.to pivotally connect the linksptogether, and

Transverse pins that each of these the. intermediate links. C'-have,thei r. outer.

lugs 4= to engage; the heads d of the p1ns,,,thereby,to prevent these pins from turning in shapedportions 1, it followsthat these shapedchannels have a practically. continua ous engagement with the wedge-shaped-portions 6 of the. wheel, notwithstandingthe fact that each.. h am 1 el has its sidesfformed.

with gaps" therein. gaglng side portions for each channel. are

'staggered,flso.to speak, so that-the gaps in one side of each channel areopposite the engaging portion of the other side-of the same channel, and the engaging portions are longer than the gaps, whereby the frictional engagement of the belt with the wheel is practically unbroken and continuous. At

their inner. ends, the pins D, may be provided with retaining devices 7,. of any suitablev character, to keep the p'nsfrom being Idisplaced endwise from thebeltq 1 Each link-belt A is provided on its inner" side with a lateral projection E, in the nathe intermediate links; Each ntermediate link C is provided :with

to form two V'-shaped.

. In other words, the en-.

ture of a bracket, and the pans F, which I are simply short sections of a trough, with their ends telescoped one within the other, are each secured at oneend thereof to a pair of these brackets on thetwoparallel belts. Thus the pans overlap, one upon the other, like shingles, and are free to separate or disengage each other when they travel around the wheel. While the pansand belts are traveling along a straight horizontal efiiciency thereof, inasmuch as the belts have i a smooth or frictional engagement with the supporting wheels and no sprocket teeth are necessary. \Vith the ordinary sprocketchain, requiring teeth on the sprocket-wheels, a limitation would be imposed upon the speed of the conveyer, and high speed would be impracticable if not impossible; but with the construction shown and described the pansconveyer can runat high speed, without danger of breakage or injury to the apparatus, and so smoothly that such freedom from jarring with the materials in the conveyer'do not jump up and down, and are not liable to be thrown-from the conveyer while the latter is traveling at high speed.

The chambers a, it will be seen, in the alternate links, are provided at their opposite ends with holes G which communicate with the pins D, so that the lubricant carried in said chambers is supplied to the-bearings of the pins in the links. Removable screw-plugs g are provided in the outer sides of the links A. for introduction of the lubricant into the chambers a, and in this way the belt is self-lubricating in character. The pins D, it will be seen, have a greater bearing in the links A than in the links 0, so that the pins are not as liable to be worn or cut by the friction of the links thereon. In other words, the pins D only turn in the links A, and as these links have an extensive engagement with the pins, providing ample bearing surface, it follows that ,undue wear on the pivotal bearings between the links is not as likely to occur and is practically precluded by the construction shown and described. The lubrication of these hearings in the links A helps, of course, to prevent undue wear between the links and the pins.

What I claim as my invention is 1. In a pan-conveyer, a link belt therefor comprising a series of alternate links, a series of intermediate links formed to embrace the pins having a greater bearing in said alter nate links than in said other links, said alternate links being wedgeshaped in cross-sec tion, and said intermediate links being channel-shaped in cross-section, so that when viewed in cross-section the belt has two wedge-shaped grooves, and a wheel having peripheral portions to frictionally' engage said grooves. 1

2. A link-belt comprising wedge shaped links, and open links alternating with the wedge shaped links, pins to connect the links together, said wedge shaped links having means to feed a lubricant to the bearings for said pins. 7

3. A link-belt comprising alternate and intermediate links, and pins to connect said links together, said links being each formed in one integral piece, with each'intermediate link shaped to embrace the end of an alternate link, and said links being formed to provide the belt with a channel to frictionally engage the periphery of a wheel.

Signed by me at Chicago, Illinois, this 22nd day of March, 1917.

RAYMOND W. DULL. 

